28838419720 has 128 divisors (see below), whose sum is σ = 71873101440. Its totient is φ = 10326384640.

The previous prime is 28838419711. The next prime is 28838419747. The reversal of 28838419720 is 2791483882.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12890442 + ... + 12892678.

It is an arithmetic number, because the mean of its divisors is an integer number (561508605).

Almost surely, 2^28838419720 is an apocalyptic number.

28838419720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28838419720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35936550720).

28838419720 is an abundant number, since it is smaller than the sum of its proper divisors (43034681720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28838419720 is a wasteful number, since it uses less digits than its factorization.

28838419720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 28838419720 in words is "twenty-eight billion, eight hundred thirty-eight million, four hundred nineteen thousand, seven hundred twenty".